I found a solution : the problem comes, as I think, from fbdev, that is used by default and doesn't correctly handle xrandr. By using modesetting driver, it works.
Here is what I did : − I installed xserver-xorg-video-modesetting from xorg-edgers ppa ; − I put that in /usr/share/X11/xorg.conf.d/00-modesetting.conf (create it if it doesn't exist) : Section "Device" Identifier "gma500_gfx" Driver "modesetting" Option "SWCursor" "ON" EndSection ** Changed in: linux (Ubuntu) Status: Confirmed => In Progress -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1003508 Title: gma500_gfx doesn't support icc profiles To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1003508/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs